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Since pulling it in an E-Series is so easy I vote to pull the valve and bench test it, but that would be a seriously weird set of circumstances if this ends up being an HPO problem.
In his other thread we went down the road of ICP_DES and ICP_V and IPR% and the whole nine yards. He was seeing 1.25V+ for ICP_DES trying to start the thing, and he's not getting P2285 for ICP low. If the IPR was blocked in a way to increase ICP significantly I figure it would set a P2286 (ICP high) code.
Sorry for disappearing, guys. I got frustrated and also ran out of money. Had to go work for a living. I've not done anything to the truck since last reporting. Put it all back together after checking the fuel lines and banjo bolts, but after digging all around my garage/dumpster, I can't find my fuel gauge. Asked the dealer tech what he'd recommend I do next, he mentioned the MAP sensor getting stopped up. Said to run a q-tip down the valve cover hole, check the rubber hose for cracks, and gave me a known working sensor to plug in. Also mentioned another sensor around the air intake? Said he can only check those sensors with the motor running, and since motor doesn't run, he can't check them.
I asked about the fuel pressure he had said was OK. He confirmed that he checked it with a pressure gauge on the engine side of the fuel pump and again coming out of the regulator.
But, it'll be another week before I get paid, so I can't progress too much. However, I do have a new thread to start.
I hear ya, and I'm usually the first one to call BS on anyone. It's disappointing that I spent $350 and didn't get my truck diagnosed, but he's a decent guy. Not his fault the dealer charges so much or I coulda kept paying him and he would prolly eventually figured out what's wrong. Seems likely that whatever is wrong with this truck is going to turn out to be highly unusual - I didn't earn my King Bonehead status by underwhelming - and he's no different than all of us who can't understand why it don't start. Just that he has to charge outrageous fees to guess. He actually was helping me for free and never said he wouldn't stop by my house to look at it as a "side" job, I just couldn't wait for him to get around to it and insisted on bringing to the shop. He readily admits to being stumped.
So wait.....I am confused, at first you said he couldn't check fuel pressure....now he did check it and its good?
I didn't see him check it in the time I was there, but he was already saying pressure was good at that point, to the regulator and out of it. Then, I watched him check some other things, and finally came back to talking about the fuel lines and how he didn't think fuel was making it to the heads. That's when he said he didn't have the fittings to check pressure at the back of the heads.
When I followed up this week, I asked him how he knew the pressure was good without the fittings, and he said he'd checked it at the pump. I assume he knew it was good at the regulator because he'd taken it off, taken in all apart, cleaned it up, and just knew there wasn't anything to restrict fuel flow. That's why he went to the next possible block point, the fuel lines.
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